Isoquinoline-7-carbonitrile is primarily utilized in the field of organic synthesis as a key intermediate for the production of various pharmaceutical compounds. Its structure makes it valuable in the development of drugs targeting neurological disorders, including Parkinson's disease and Alzheimer's disease, due to its potential to interact with specific biological pathways. Additionally, it serves as a building block in the synthesis of heterocyclic compounds, which are essential in creating agrochemicals and dyes. Its nitrile group also allows for further functionalization, enabling the creation of diverse derivatives with potential applications in medicinal chemistry and material science.